package cuiyt.juc.unsafe.collection;

import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
import java.util.TreeMap;

/**
 * @author cyt
 * @create 2020-09-01 上午 12:38
 */
public class MapTest {

    public static void main(String[] args) {

        Map<String, String> map;
        map = new HashMap<>();
        map = new Hashtable<>();
        map = new TreeMap<>();


    }
}
